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TABS Short-Term Municipal Bond Fund (A)

The Fund

One of the industry's only "crossover" investment products, the Fund employs a quantitative approach to investing in primarily high-quality municipal and U.S. government bonds (including agency bonds).

The Approach

Managed for after-tax total return, the Fund seeks to add value through active management and access to institutional pricing. Value-focused allocations are based on relative attractiveness of investments in different market cycles.

The Features

Designed for clients who may wish to mitigate risk through high quality and limited duration, or for those looking for an option to complement longer-maturity or lower-quality strategies.

Past performance is no guarantee of future results. Investment return and principal value will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Performance is for the stated time period only; due to market vola tility, the Fund's current performance may be lower or higher than quoted. Returns are historical and are calculated by determining the percentage change in net asset value (NAV) with all distributions reinvested. Returns for other classes of shares offe red by the Fund are different. Performance less than or equal to one year is cumulative. After-tax returns are calculated using certain assumptions, including using the highest individual federal income tax rates in effect at the time of the distribution s and do not reflect the impact of state/local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions and may differ from those shown. After-tax returns are not relevant to shareholders wh o hold shares in tax-deferred accounts or shares held by nontaxable entities. Return After Taxes on Distributions may be the same as Return Before Taxes for the same period because no taxable distributions were made during that period. Return After Taxes on Distributions and Sale of Fund Shares may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares. Before-tax and after-tax returns for other classes of shares offered by the Fund are different. Total return prior to the commencement of the A shares is that of a private investment partnership (the Predecessor Account). The Fund is managed in a materially equivalent manner to the Predecessor Account. Performance shown p rior to the inception of the A shares is adjusted to reflect any applicable sales charge, but not adjusted for other expenses. If adjusted, performance would have been lower. The Predecessor Account was not subject to certain investment restrictions, div ersification requirements or other restrictions imposed by the 1940 Act or regulated under the Internal Revenue Code of 1986 (Account was not required to make annual income distributions to investors). If such requirements were applicable to the Predeces sor Account, the performance shown may have been adversely affected. Max Sales Charge: 2.25%.

Portfolio Management

Portfolio profile subject to change due to active management. Percentages may not total 100% due to rounding.

About Risk:

The value of investments held by the Fund may increase or decrease in response to economic, and financial events (whether real, expected or perceived) in the U.S. and global markets. There generally is limited public information about municipal issuers. As interest rates rise, the value of certain income investments is likely to decline. Investments in debt instruments may be affected by changes in the creditworthiness of the issuer and are subject to the risk of non-payment of principal and interest. The value of income securities also may decline because of real or perceived concerns about the issuer's ability to make principal and interest payments. No fund is a complete investment program and you may lose money investing in a fund. The Fund may engage in other investment practices that may involve additional risks and you should review the Fund prospectus for a complete description.

1. Bloomberg Barclays 5 Year Municipal Bond Index is an unmanaged index of municipal bonds traded in the U.S. with maturities ranging from 4-6 years. Unless otherwise stated, index returns do not reflect the effect of any applicable sales charges, commissio ns, expenses, taxes or leverage, as applicable. It is not possible to invest directly in an index. Historical performance of the index illustrates market trends and does not represent the past or future performance of the fund.
2. Source: Fund prospectus.
3. Top 10 Holdings excludes cash and equivalents.
4. Percent of total net assets.

Past performance is no guarantee of future results. Investment return and principal value will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Performance is for the stated time period only; due to market vola tility, the Fund's current performance may be lower or higher than quoted. Returns are historical and are calculated by determining the percentage change in net asset value (NAV) with all distributions reinvested. Returns for other classes of shares offe red by the Fund are different. Performance less than or equal to one year is cumulative. After-tax returns are calculated using certain assumptions, including using the highest individual federal income tax rates in effect at the time of the distribution s and do not reflect the impact of state/local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions and may differ from those shown. After-tax returns are not relevant to shareholders wh o hold shares in tax-deferred accounts or shares held by nontaxable entities. Return After Taxes on Distributions may be the same as Return Before Taxes for the same period because no taxable distributions were made during that period. Return After Taxes on Distributions and Sale of Fund Shares may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares. Before-tax and after-tax returns for other classes of shares offered by the Fund are different. Total return prior to the commencement of the A shares is that of a private investment partnership (the Predecessor Account). The Fund is managed in a materially equivalent manner to the Predecessor Account. Performance shown p rior to the inception of the A shares is adjusted to reflect any applicable sales charge, but not adjusted for other expenses. If adjusted, performance would have been lower. The Predecessor Account was not subject to certain investment restrictions, div ersification requirements or other restrictions imposed by the 1940 Act or regulated under the Internal Revenue Code of 1986 (Account was not required to make annual income distributions to investors). If such requirements were applicable to the Predeces sor Account, the performance shown may have been adversely affected. Max Sales Charge: 2.25%.

Morningstar Rating™as of Apr 30, 2018

The Morningstar Rating™ for funds, or "star rating", is calculated for managed products (including mutual funds and exchange-traded funds) with at least a three-year history. Exchange-traded funds and open-ended mutual funds are considere d a single population for comparative purposes. It is calculated based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a managed product's monthly excess performance, placing more emphasis on downward variations and rewarding consistent performance. The top 10% of products in each product category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars, and the bottom 10% receive 1 star.

The Overall Morningstar Rat ing for a managed product is derived from a weighted average of the performance figures associated with its three-, five-, and 10-year (if applicable) Morningstar Rating metrics. The weights are: 100% three-year rating for 36-59 months of total returns, 60% five-year rating/40% three-year rating for 60-119 months of total returns, and 50% 10-year rating/30% five-year rating/20% three-year rating for 120 or more months of total returns. While the 10-year overall star rating formula seems to give the most weight to the 10-year period, the most recent three-year period actually has the greatest impact because it is included in all three rating periods. Star ratings do not reflect the effect of any applicable sales load.

Capital Gain History8

No records in this table indicates that there has not been a capital gain greater than .0001 within the past 3 years. Fund prospectus

Portfolio profile subject to change due to active management. Percentages may not total 100% due to rounding.

About Risk:

The value of investments held by the Fund may increase or decrease in response to economic, and financial events (whether real, expected or perceived) in the U.S. and global markets. There generally is limited public information about municipal issuers. As interest rates rise, the value of certain income investments is likely to decline. Investments in debt instruments may be affected by changes in the creditworthiness of the issuer and are subject to the risk of non-payment of principal and interest. The value of income securities also may decline because of real or perceived concerns about the issuer's ability to make principal and interest payments. No fund is a complete investment program and you may lose money investing in a fund. The Fund may engage in other investment practices that may involve additional risks and you should review the Fund prospectus for a complete description.

1. Bloomberg Barclays 5 Year Municipal Bond Index is an unmanaged index of municipal bonds traded in the U.S. with maturities ranging from 4-6 years. Unless otherwise stated, index returns do not reflect the effect of any applicable sales charges, commissio ns, expenses, taxes or leverage, as applicable. It is not possible to invest directly in an index. Historical performance of the index illustrates market trends and does not represent the past or future performance of the fund.
2. Source: Fund prospectus.
5. The Morningstar Muni National Short Category includes funds that invest in bonds issued by state and local governments that are free from federal taxes and typically have a duration of less than 4.5 years.
6. SEC 30-day yield is a standardized measure based on the estimated yield to maturity of a fund's investments over a 30-day period and is based on the maximum offer price at the date specified. The SEC 30-day yield is not based on the distributions made by the fund, which may differ. Distribution Rate at NAV is calculated by dividing the last distribution paid per share (annualized) by NAV. The Fund's monthly distribution may be comprised of ordinary income, net realized capital gains and returns of capit al.
7. Distribution Rate at NAV and Market Price is calculated by dividing the last distribution paid per share (annualized) by NAV or market price, respectively. For National Municipal Funds, Taxable-Equivalent Distribution Rate at NAV and Market Price is calc ulated using a 40.8% tax rate (equals maximum individual federal tax rate adjusted for the Medicare surtax). For Single-State Municipal Funds, Taxable-Equivalent Distribution Rates also reflect maximum effective individual state income tax rates. Local i ncome taxes that may apply are not considered.
8. The Fund's distributions may be comprised of tax-exempt income, ordinary income, net realized capital gains and return of capital. The Fund will determine the tax characteristics of all Fund distributions after the end of the calendar year and will provi de shareholders such information at that time. Please consult your tax advisor for further information.

Credit Quality (%)9as of Mar 31, 2018

Ratings are based on Moody's, S&P or Fitch, as applicable. If securities are rated differently by the ratings agencies, the highest rating is applied. Ratings, which are subject to change, apply to the creditworthiness of the issuers of the underlying securities and not to the Fund or its shares. Credit ratings measure the quality of a bond based on the issuer's creditworthiness, with ratings ranging from AAA, being the highest, to D, being the lowest based on S&P's measures. Ratings of BBB or higher by S&P or Fitch (Baa or higher by Moody's) are considered to be investment-grade quality. Credit ratings are based largely on the ratings agency's analysis at the time of rating. The rating assigned to any particular security is not necessarily a reflection of the issuer's current financial condition and does not necessarily reflect its assessment of the volatility of a security's market value or of the liquidity of an investment in the security. Holdings designated as "Not Rated" are not rated by the national ratings agencies stated above.

Portfolio profile subject to change due to active management. Percentages may not total 100% due to rounding.

About Risk:

The value of investments held by the Fund may increase or decrease in response to economic, and financial events (whether real, expected or perceived) in the U.S. and global markets. There generally is limited public information about municipal issuers. As interest rates rise, the value of certain income investments is likely to decline. Investments in debt instruments may be affected by changes in the creditworthiness of the issuer and are subject to the risk of non-payment of principal and interest. The value of income securities also may decline because of real or perceived concerns about the issuer's ability to make principal and interest payments. No fund is a complete investment program and you may lose money investing in a fund. The Fund may engage in other investment practices that may involve additional risks and you should review the Fund prospectus for a complete description.

4. Percent of total net assets.
9. Percent of bond holdings.
10. The following list reflects unaudited securities holdings (excluding derivatives positions). Holdings information may differ if presented as of trade date. Due to rounding, holdings of less than 0.005% may show as 0.00%. Portfolio information subject t o change due to active management.

Management

James H. Evans, CFA

Vice President, Eaton Vance Management
Joined Eaton Vance 2008

Biography

James Evans is a vice president of Eaton Vance Management, director of the tax-advantaged bond strategies (TABS) division and portfolio manager on Eaton Vance's TABS team. Jim joined Eaton Vance in December 2008 when it acquired M.D. Sass Tax Advantaged Bond Strategies, LLC, where he was senior portfolio manager and manager of the TABS team.

Jim joined M.D. Sass in 1990 to manage its clients' municipal bond portfolios. He has over 30 years of investment experience. Previously, he was affiliated with Kidder, Peabody & Company as vice president in charge of its municipal arbitrage account, and with Continental Bank and Mellon Bank, where he was a municipal bond trader/underwriter.

Jim earned a B.S. in engineering from Cornell University. He is a CFA charterholder. Jim's commentary has appeared in Bloomberg, The Bond Buyer and Barron's, among other publications.

Biography

Brian Barney is a vice president of Eaton Vance Management, director of institutional portfolio strategies and municipal portfolio manager on Eaton Vance’s tax-advantaged bond strategies team. He is responsible for buy and sell decisions, portfolio construction and risk management for the firm’s tax-advantaged bond strategies. He joined Eaton Vance in 2009.

Brian began his career in the investment management industry in 2001. Before joining Eaton Vance, he was affiliated with M.D. Sass Tax Advantaged Bond Strategies, LLC, where he was vice president and municipal portfolio manager.

Brian earned a B.S. in systems engineering from the University of Virginia. He is a CFA charterholder.

Biography

Devin Cooch is a vice president of Eaton Vance Management and municipal portfolio manager and trader on Eaton Vance's tax-advantaged bond strategies team. He is responsible for buy and sell decisions, portfolio construction and risk management for the fi rm's tax-advantaged bond strategies. He joined Eaton Vance in 2008.

Devin began his career in the investment management industry in 2008. Before joining Eaton Vance, he was affiliated with M.D. Sass Tax Advantaged Bond Strategies, LLC, where he was a trading assistant and accountant. He was previously affiliated with KPM G, LLP.

Devin earned a B.A. in economics, magna cum laude, from Bucknell University. He is a CFA charterholder.

Summary Prospectus

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Before investing in any Eaton Vance fund or unit investment trust (UIT), prospective investors should consider carefully the investment objective(s), risks, and charges and expenses. For open-end mutual funds and UITs, the current prospectus contains this and other information. To obtain a mutual fund prospectus or summary prospectus and the most recent annual and semiannual shareholder reports, contact your financial advisor or download a copy here. Read the prospectus carefully before you invest or send money. For closed-end funds, you should contact your financial advisor. To obtain the most recent annual and semi-annual shareholder report for a closed-end fund contact your financial advisor or download a copy here. To obtain a UIT prospectus, contact your financial advisor or download a copy here. Before purchasing any variable product, consider the objectives, risks, charges, and expenses associated with the underlying investment option(s) and those of the product itself. For a prospectus containing this and other information, contact your investment or insurance professional. Read the prospectus carefully before investing.

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Eaton Vance does not provide tax or legal advice. Prospective investors should consult with a tax or legal advisor before making any investment decision.

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(International) ltd (EVMI) is prohibited by any law of any jurisdiction from making the information on this website available to you and is not
intended for any use that would be contrary to local law or regulation. No products and services mentioned on this website must be promoted in
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This website does not constitute investment, legal or tax advice with respect to our products and services and it is important
that you do not rely on its content when making an investment decision. You should obtain relevant and specific professional advice before making
any decision to enter into an investment transaction. EVMI does not represent that the information on this website, including any third party
information, is accurate or complete and it should not be relied upon as such. Past performance is not a guide to future returns.

The value of investment funds and the income therefrom may go down as well as up and you may not get back the original amount invested.
Your capital could be at risk. You are not certain to make money from your investments and you may lose money. Exchange rates may cause the value of
overseas investments and the income therefrom to rise and fall.

Information in this section may contain statements that are not historical facts, referred to as forward-looking statements.
A Fund’s future results may differ significantly from those stated in forward-looking statements, depending on factors such as changes in
securities or financial markets or general economic conditions, the volume of sales and purchases of Fund shares, the continuation of advisory,
administrative and service contracts, and other risks.

All information in this section are for "Professional Client ONLY". To access this website users must qualify as a "Professional
client". Any person who does not fall into the categories listed above should not rely on the information contained in this website.

By clicking the Okay button below, you confirm that you are from an eligible jurisdiction to review material relating to the
Fund or Strategies (or are authorised to conduct investment business in the jurisdiction within which you are resident and under the law of that
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Disclosure - Restricted content

The information contained in this section of the website is designed solely for professional clients.
If you are not a professional client you should not proceed any further. The content should not be looked at or distributed to retail clients.

Certain products and services mentioned on this website may not be eligible for sale in some states or countries and they may not
be suitable for all types of investors. This website does not constitute an offer or solicitation and is not directed at you if Eaton Vance Management
(International) ltd (EVMI) is prohibited by any law of any jurisdiction from making the information on this website available to you and is not
intended for any use that would be contrary to local law or regulation. No products and services mentioned on this website must be promoted in
any jurisdiction where this would not be permitted.

This website does not constitute investment, legal or tax advice with respect to our products and services and it is important
that you do not rely on its content when making an investment decision. You should obtain relevant and specific professional advice before making
any decision to enter into an investment transaction. EVMI does not represent that the information on this website, including any third party
information, is accurate or complete and it should not be relied upon as such. Past performance is not a guide to future returns.

The value of investment funds and the income therefrom may go down as well as up and you may not get back the original amount invested.
Your capital could be at risk. You are not certain to make money from your investments and you may lose money. Exchange rates may cause the value of
overseas investments and the income therefrom to rise and fall.

Information in this section may contain statements that are not historical facts, referred to as forward-looking statements.
A Fund’s future results may differ significantly from those stated in forward-looking statements, depending on factors such as changes in
securities or financial markets or general economic conditions, the volume of sales and purchases of Fund shares, the continuation of advisory,
administrative and service contracts, and other risks.

All information in this section are for "Professional Client ONLY". To access this website users must qualify as a "Professional
client". Any person who does not fall into the categories listed above should not rely on the information contained in this website.

By clicking the Okay button below, you confirm that you are from an eligible jurisdiction to review material relating to the
Fund or Strategies (or are authorised to conduct investment business in the jurisdiction within which you are resident and under the law of that
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GENERAL DISCLAIMER

Certain products and services mentioned on this website may not be eligible for sale in some states or countries and they may not be suitable for all types of investors. This website does not constitute an offer or solicitation and is not directed at you if Eaton Vance Management (International) ltd (EVMI) is prohibited by any law of any jurisdiction from making the information on this website available to you and is not intended for any use that would be contrary to local law or regulation. No products and services mentioned on this website must be promoted in any jurisdiction where this would not be permitted.

This website does not constitute investment, legal or tax advice with respect to our products and services and it is important that you do not rely on its content when making an investment decision. You should obtain relevant and specific professional advice before making any decision to enter into an investment transaction. EVMI does not represent that the information on this website, including any third party information, is accurate or complete and it should not be relied upon as such. Past performance is not a guide to future returns.

The value of investment funds and the income therefrom may go down as well as up and you may not get back the original amount invested. Your capital could be at risk. You are not certain to make money from your investments and you may lose money. Exchange rates may cause the value of overseas investments and the income therefrom to rise and fall.

Information in this section may contain statements that are not historical facts, referred to as forward-looking statements. A Fund’s future results may differ significantly from those stated in forward-looking statements, depending on factors such as changes in securities or financial markets or general economic conditions, the volume of sales and purchases of Fund shares, the continuation of advisory, administrative and service contracts, and other risks.

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The Fund is an umbrella fund of the Eaton Vance Institutional Funds plc (the "Company"), a public limited company with variable capital with segregated liability between sub-funds incorporated in Ireland pursuant to the Companies Acts. The Company is authorised and regulated by the Central Bank of Ireland as a Qualified Investors Alternative Investment Fund (QIAIF) and solely intended for Qualified Investors (as defined in the Fund prospectus).

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